#!/bin/bash

readonly MODE='wipe'                # total wipe of work dir optionally preserving package cache
readonly PRESERVE_CACHE='false'     # preserve package cache in 'wipe' mode
# readonly MODE='rebuild'           # full update rebuild preserving work dir
# readonly MODE='tweak'             # apply chroot customization tweaks only
#readonly TARGET='dual'              # dual-arch                   (default)
#readonly TARGET='i686'            # i686 target only
readonly TARGET='x86_64'          # x86_64 target only
# readonly EDITION='OpenRC/CLI'     # OpenRC/CLI init/WM-DE pair
# readonly EDITION='OpenRC/LXDE'    # OpenRC/LXDE init/WM-DE pair
readonly EDITION='SystemD/CLI'      # SystemD/CLI init/WM-DE pair (default)
# readonly EDITION='SystemD/LXDE'   # SystemD/LXDE init/WM-DE pair
readonly TALKING=''                 # speech and braille disabled (default)
#readonly TALKING='-S'             # speech and braille enabled
readonly CACHE=''                   # net-install                 (default)
#readonly CACHE='-O'               # offline install
readonly VERSION="`date +%Y.%m.%d`" # for ISO filename            (default)
# readonly VERSION="`date +%Y.%m.%d-%H.%M`-alpha"


((`id -u`)) && echo "This script must be run with root privileges." && exit

# cleanup in case of previous aborted run
while pids=$(pidof ./rebuild.sh || pidof sudo ./rebuild.sh) && pids=${pids/$PPID/} && [ "$pids" ]
do    for pid in ${pids/$PPID/} ; do sudo kill -9 $pid ; done ; sleep 1 ;
done
for work_dir in "$PWD/work/i686" "$PWD/work/x86_64"
do  declare -a mountpoints=()
    for mnt in dev/pts dev/shm dev proc run sys tmp; do
        mountpoint=$(findmnt --noheadings --output="TARGET" "${work_dir}/root-image/${mnt}" || true)
        if [[ "${mountpoint}" != "" ]] ; then mountpoints=( ${mountpoints[@]} "${mountpoint}" ) ; fi ;
    done
    for mountpoint in ${mountpoints[@]} ; do umount "${mountpoint}" ; done ;
done

if   [ "$MODE" == 'wipe' ]
then if [ "$PRESERVE_CACHE" == 'true' ]
     then for arch in i686 x86_64
          do  isorepo=./work/${arch}/root-image/isorepo
              cache_dir=./work/isorepo-${arch}
              mkdir -p $cache_dir
              [ -d $isorepo ] && mv $isorepo/* $cache_dir/ 2> /dev/null
          done
     fi

     rm -rf ./work/${arch} 2> /dev/null

     for arch in i686 x86_64
     do  isorepo=./work/${arch}/root-image/isorepo
         cache_dir=./work/isorepo-${arch}
         if [ "$PRESERVE_CACHE" == 'true' ]
         then if   [ "$TARGET" == 'dual' -o "$TARGET" == "${arch}" ]
              then mkdir -p $isorepo
                   mv $cache_dir/* $isorepo/
                   rmdir $cache_dir
              fi
         else rmdir $cache_dir 2> /dev/null
         fi
     done

elif [ "$MODE" == 'rebuild' ]
then rm -v ./work/build.make_*

elif [ "$MODE" == 'tweak' ]
then rm work/build.make_customize_root_image_$TARGET \
        work/build.make_prepare_$TARGET              \
        work/build.make_iso*                         2> /dev/null
fi


CMD="./build.sh -v -E $EDITION -T $TARGET $TALKING $CACHE -V $VERSION $*"
if   ${CMD}
then echo "success" ; rm ./continue.sh 2> /dev/null
else echo -e "failure executing:\n\t${CMD}\ncontinue with:\n\t./continue.sh [args-to-build.sh]"
     echo -e "#!/bin/bash\n\n${CMD} \$*" > ./continue.sh
     chmod a+x ./continue.sh
fi
